Dictionary.com Thesaurus.com

hypnograph

American

[hip-nuh-graf, -grahf] / ˈhɪp nəˌgræf, -ˌgrɑf /

noun

an instrument that measures activities of the human body during sleep.

Etymology

Origin of hypnograph

hypno- + -graph

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.